Bikas Saha commented on YARN-752:

bq. Wrapping the test in a MiniYARNCluster and other structures used for the 
AMRMClient lifecycle testing in TestAMRMClient will make debugging this 
specific functionality more difficult in the future.
Thats fine. Can that not be done within the existing file TestAMRMClient.java 
instead of creating a new one? Just helps to keep all related tests in one 
place. Not a big deal if thats not simple.
> In AMRMClient, automatically add corresponding rack requests for requested 
> nodes
> --------------------------------------------------------------------------------
>                 Key: YARN-752
>                 URL: https://issues.apache.org/jira/browse/YARN-752
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: api, applications
>    Affects Versions: 2.0.4-alpha
>            Reporter: Sandy Ryza
>            Assignee: Sandy Ryza
>         Attachments: YARN-752.patch
> A ContainerRequest that includes node-level requests must also include 
> matching rack-level requests for the racks that those nodes are on.  When a 
> node is present without its rack, it makes sense for the client to 
> automatically add the node's rack.

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